Locomotive-boiler furnace.



J. H. GROVE., LOGOMOTIVE BOILER FURNAGE.

APPLICATION FILED mmm, 190s.

Patented July 16, 1912.

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2 SHEETS-SHEET 1-.

mesff GI'QZ/e J. H. GROVB 1 LOCOMOTIVE BOILER PURNAGB.` APPLIQATION FILED 0020.19, 1908.

mama July 1,6, 1912.

SHEETS-'SHEET 2.

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JAMES H. GROVE, OF OMAHA, NEBRASKA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO AMERICAN ARCH COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

LOCOJWIOTIVE-BOILE FUR/NACE.

i ,casona Specification of Letters lllacent.

Patented Joly 16,1912.

Application filed October 19, 1808. Serial No. 458,524.

"' ing of iignite.

This present invention is a modification of that which is shown and described in my pending application No. 387,442, entitled i Lig-nite burning furnaces, tiled August 7 1Q "i".

lny invention consists generally in locomotive boiler furnacescomprisingv a firebox haring flue sheet at one end and a f uel door at the opposite end, 1n combination with an inclined front arch abutting the flue sheet and extending rearwardly and .up-

'rear end of the firebox, a plurality of transvii'se arches composed of refractory material arranged above and back of the rear end of the fri'int arch; all as hereinafter more fully described and particularly pointed out in the claims. v f

My invention will bemore readily understood by refer-,ence to the accoi'npanying drawings, forming a part of this specification and in which- Figure l is a Vertical longitudinal section of a locomotive boiler furnace embodying my invention. Fig. Q is a plan View thereof, the crown sheet yof the furnace being broken away to disclose the construction and positions of the several refractory arches. Fig. 3 a vertical section on the line Xe-X of Fig. l. Fig. 4 isa smaller vertical section of my invention embodied in a firebox of the narrow type.

In vthe drawings the boiler; 3 the fines: 4 .the flue. sheet; A5

therear sheet of the fire box; 6 the door" opening; 7 the fuel door which closes .the

openinff; 8 the side sheets; 9 the crown to introduce heated air into the cen- 'door is opened;

2 represents theshell of sheet and l the grate, In-the front part of the firebox, extending rearwardly from the flue sheet is an inclined refractory arch, A. This is of the well known Wade Sn Nichol- Vson hollow arch type, being provided with a plurality of air passages, a, which receive -air through the thiinbles, 11, at the lower endv vof. the arch. .The air is heated while passing through the arch .A and on emerging from the upward ends of the passades, c, impinges upon the deflector bricks` a and Y is thereby turned'or deflected downwardly toward the tirebox. A B is an arch composed of refractory bricks extending Vbetween the side sheets, 8, 8, at a point adjacent toand preferably slightly abovethe rear end of the hollow. front arch A. Only a small throat or opening, C, is left between the arches A and B. Arch, B,

is preferably formed so that the longitudinal lines on the under surface are horizontal (as shown in Fig. l). The rear surface, b', is preferably vertical. lt will be noted that a large space, is left between the .top of the arch, B, and the crown sheet, 9 and in this space l arrange another or upper refractoryarch, D, substantially identical with the arch B, The throat yor opening, E, between the top of the arch B and the bottom of the arch l) is preferably larger than the throat C. The arches A, and D being of refractory material take on the high temperature of the fireboxband the arches B and l) attain the highest tempe 1ature of the box. These arches B and D together .present in the aggregate a considerable mass of refractory n'iaterial atthe throat or opening of the furnace. The term throatif as here used defines Tin a general sense the dspace between the rear or upper end of the main arch or dcflector, A, and thel crown sheet of the. box.

`The special advantage of ahotmass of bricks at this point-vis that when heated asdescribed they tend to maintain they temperature in the upper part of the box at all times, and particularly at the `times LWhen the fuel The heatedair from the grate and the rear end of theafront arch in descending'toward the grate accomplishes several' important results. First, its admission substantially at the center'of the furnace'reduces the vacuum on the surface of the bed of lignite on the grate, 10,V Second, thedownward moving streams of air counteract and tend `to reduce the vev mmm Lit

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:dion m" lll fina@ x' Lompoc "to inlroiluce h latrvl air and project if clown- \vardl.v from the upper euil ihereoff a pluralitq.' or'` refrarloi-v vertical baille arches projectingv across the fire box above and l acli olt .saiil vfront arch` arranged oui of aline.- inen, thereby foi-nuncr paaeages between the Vfuel chamber aiul the combustion chamber therein. saiil passages hein;y arranged and adapted to impart a zig-zag flow to the rebox gases, subslanliall)v as (lesrribecl.

(i. locomotive lirihox in combination with an iin-lined front arch therein, saiil arch being4 ailaplwl lo introduce heaeil air and projei'iL i lo\vu\\arrlly from the upper parl'. oli' said front arch. an upper and a lower vertical baille arch arranged in the upper portion oiLl (he rear end of the fire box, laid lower arch being spaced to he rear from ihc rear en l of ,said inclined arch and' .sa-irl upper arch having' its 'r'ornf'ard fare subhtantalllvv in alineuienl with the rear end 0i saiil inrlinml arch.

T. A\ .locouioive lirebox having a fine shi-ei ai one, ruil, a fuel door at the other eml and a lr1-ate at the bottoni thereof, in

cmnbinaition with an inclined refractory nfrom arch interposed beween the flue, sheet aml ihe zgrate diviilinzgy the Firebox into a fuel chamber below and aV combustion charnber above the arch, .saiil arch havingair inle ducts herein adapeil for transmitting, heating and discharging air rearwardly and downwardly into the firebox and a pair of refractory vertiral ballle arches extending across he firebox above and baclLof said front arch, one lying close to the top of the iirehox and rhe. oher spaced-slightly beneath hc former and substantially equidisiaut ifroni 'he upper baille. arch ainlthe front arch thus providing a pair ci' throats leading from lie fuehchaniber to the coinbusion chamber.

In testimony whercoi have. hereunto set i115y hanii, this 10th (lay oi October` 1908, in the presence of'twyo subscribingY witnesses.

JANE@ H. GRCVE.

YVi l'nesses:

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